HELP:iesecure, maleware threats and constint back door virus threats

Can some one please help me out with this problem i woke up this morning and turned on my computer and i started getting these SYSTEM ALERT: MALEWARE THREATS saying that my computer is infected with a back door trojan that allows the remote attacker to perform malicious actions and when i try to go on the internet it goes to this IESECURE web page and it say they ran a scan and i am at risk,also i keep getting these porno pop ups and i dont no were they came from because i have pop up alert when i try to report abuse it say that some body downloaded to watch free videos and i pay with the pop ups

so i went to best buy and bought a spy ware and anti virus program because i didnt have ne protection the program i bought was TREND MICRO internet security and i ran all the scans i caught some trojans then i deleted them and i had like 120 spy ware things infected if some body can please help me out i would really like it

To download HJTsetup.exe To Download HijackThis go to the following: http://www.thespykiller.co.uk/forum/index.php?action=tpmod;dl=item5
Filename = 1137518044HJTsetup.exe
Save the file to your desktop.
Double click on the HJTsetup.exe icon on your desktop.
By default it will install to C:\Program Files\HijackThis.
Continue to click Next in the setup dialog boxes until you get to the Select Additional Tasks dialog.
Put a check by Create a desktop icon then click Next again.
Continue to follow the rest of the prompts from there.
At the final dialog box click Finish and it will launch Hijack This.
Click on the Do a system scan and save a log file button. It will scan and then ask you to save the log.
Click Save to save the log file and then the log will open in notepad.
At the top of the Notepad HJT log screen, hit Edit then Select All then click Edit and then click Copy doing that copies the text to the clipboard, you won't see it yet....
Come back here to this thread and Paste the log in your next reply.
DO NOT have Hijack This fix anything yet. Most of what it finds will be harmless or even required.

oh realy thank you man realy you dont no how much i need help this is messing up every thing and it needs to go away thanks for the help man
so they are pretty good about helping all the forums and stuff or what im new to this i just wondering well i geuss i can just wait and see
thank you again

please help now when i log on the system goes to a disk chk b4 letting me log on to comp and im scaird that this problem is takeing over my computer some one please help me i dont no what is going on and this is the only thing i have to get my school work done and i realy depend on this comp please help thank you